Transparent ASM profile breaks RDS GW connection?

Do you get logged violations in the ASM Event log?

Does your ASM profile implement DeviceID/Session Opening Tracking or other features that cause clientside Javascript insertion?

Do you have Dataguard enabled, as this is also active even in a Transparent profile, and can modify content impacting functionality.

Many features of ASM can interfere with complex website operation, and some of these are independent of the blocking/transparent status of the policy.